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iSpin-NMR

that is on for 10.0 μs.  The amplitude of the sinusoid depends on the attenuation of the 

RF output signal.  This will repeat 100 times every 0.5 seconds and then stop.  The 

diagram in Figure 8, on the following page, shows what a typical oscilloscope output will 

look like for this test.

6. Repeat this test a few times, increasing the amplitude setting until you reach your 

desired output power (up to a maximum of 1.0). The output power should not exceed 

10W RMS for a PA10W, 15W RMS for a PA15W, etc.

7. To test the 

Receiver

, edit the following parameters in the singlepulse_nmr_example.bat 

file:

NUMBER_OF_SCANS = 1

NUMBER_POINTS = 16384

SPECTROMETER_FREQUENCY = 20.001     

(MHz)

SPECTRAL_WIDTH = 50     (

kHz

)

BYPASS_FIR = 1

FNAME = rx_test

      Use the amplitude you determined in step 5 above. 

2020-07-21

17

www.spincore.com

Figure 8: Representation of the oscilloscope output for the iSpin-NMR transmitter test.  
The iSpin-NMR's internal RF power amplifiers requires a specific de-blanking time, for  

each model, prior to the RF pulse for full output power .  The de-blanking time for 
each power amplifier can be found in the RF power amplifier manuals, which can be 

downloaded at 

http://spincore.com/products/RFPA/RF-Power-Amplifier.shtml

.

De-

blanking 

Signal

RF 

Output

De-blanking Delay

Pulse Time

Summary of Contents for iSpin-NMR

Page 1: ...iSpin NMR Owner s Manual SpinCore Technologies Inc http www spincore com...

Page 2: ...Inc reserves the right to make changes to the product s or information herein without notice RadioProcessor iSpin NMR PulseBlaster SpinCore and the SpinCore Technologies Inc logos are trademarks of S...

Page 3: ...by step Instructions 15 Conducting an NMR Experiment with the iSpin NMR Step by step Instructions 19 VIII MATLAB GUI Interface 21 Overview of SpinCore MATLAB GUI Interface 21 General Features 21 Samp...

Page 4: ...iSpin NMR XIV Document Information 30 2020 07 21 4 www spincore com...

Page 5: ...ing to SpinCore s RadioProcessor board the primary component of the iSpin NMR system responsible for all digital control and signal processing or information about writing your own pulse programs and...

Page 6: ...usly It connects to any PC or laptop via USB 2 0 The iSpin NMR system console is equipped with a universal AC input power supply 90 to 240 VAC and consumes no more than 80 Watts The power supply insid...

Page 7: ...fast switching diodes The diodes and the 4 cable protect the receiver of the iSpin NMR system when excitation pulses are applied while facilitating the isolation of the transmitter s circuitry from th...

Page 8: ...between the excitation pulses and the signal input from the probe The input signal from the sample probe is passed through a lambda quarter cable part of the Transmit Receive switching circuit fed in...

Page 9: ...A photograph of the internal components of the older single bay iSpin NMR system is shown below in Figure 3 For descriptions of each component see the following page 2020 07 21 9 www spincore com Figu...

Page 10: ...p spincore com products RFPA If higher power is needed a final Power Amplifier stage can be provided with output power ranging from 100 to 1000 Watts Please contact SpinCore for more details 3 Preampl...

Page 11: ...2 0 Interface Contains the USB 2 0 interface hardware and software 7 Large diameter fan Included for efficient heat dissipation and quiet operation 8 Ample space inside There is plenty of room inside...

Page 12: ...the external connectors of the iSpin NMR Figure 4 below shows a sketch of the front and back panels of the iSpin NMR system 2020 07 21 12 www spincore com Figure 4 Front left and back right sides of...

Page 13: ...xample of the connector layout CAUTION Output voltages can reach values greater than 200 V peak to peak and can be fatal CAUTION A 50 load needs to be present at the RF Power Out or To Probe connector...

Page 14: ...ndard USB 2 0 cable Hardware Reset Trigger Connectors Access to the hardware reset and hardware trigger lines of the RadioProcessor USB is provided via RCA jacks labeled Reset and Trigger For more inf...

Page 15: ...ion on each programming function can be found on our SpinAPI References page that is linked from our main SpinAPI page the direct link to that page is http www spincore com support spinapi reference p...

Page 16: ...API RadioProcessor Examples to your new working directory The SpinCore RadioProcessor directory can be found in the examples folder located in the SpinAPI folder 4 To test the Transmitter edit the fol...

Page 17: ...e following parameters in the singlepulse_nmr_example bat file NUMBER_OF_SCANS 1 NUMBER_POINTS 16384 SPECTROMETER_FREQUENCY 20 001 MHz SPECTRAL_WIDTH 50 kHz BYPASS_FIR 1 FNAME rx_test Use the amplitud...

Page 18: ...t fid file using Felix NMR software available for 32 bit Windows systems available for download at http www spincore com support RadioProcessor Felix Felix_Instructions shtml and verify the 1 kHz sign...

Page 19: ...nnector corresponds to the RF Power Out If you have any questions PLEASE contact us 4 Create your own new working directory somewhere outside of the SpinCore directory and copy the contents of the Spi...

Page 20: ...MR data received should look something like that of the screenshots shown in sections VIII and IX For information about about specific control signals for NMR tests which would allow for custom NMR ex...

Page 21: ...idth Determination Change experiment parameters quickly and easily Preview data in MATLAB immediately after the scan Combine the versatility of the RadioProcessor with the power of the MATLAB environm...

Page 22: ...Sample Screenshots 2020 07 21 22 www spincore com Figure 11 Sample output after running Single Pulse NMR experiment on household cooking oil Figure 12 Output as above displaying Magnitude plot and Sem...

Page 23: ...iSpin NMR 2020 07 21 23 www spincore com Figure 13 Sample output after running CPMG NMR experiment on household cooking oil Figure 14 Sample T2 calculation and curve fitting...

Page 24: ...iSpin NMR 2020 07 21 24 www spincore com Figure 15 Automatic 90 Degree Pulse Width Determination...

Page 25: ...in this manual Extra features in LabVIEW GUI include lightning fast resonance finder built in FFT and phasing CYCLOPS phase cycling experiments 90 degree pulse width finder and continuous scan mode Th...

Page 26: ...iSpin NMR 2020 07 21 26 www spincore com Figure 17 Example of Pulse Width Finder for LabVIEW NMR Interface...

Page 27: ...pass filters at those specific frequencies Contact SpinCore Technologies for more information Figure 18 on the following page shows the iSpin NMR receiver sensitivity when connected to a 72 MHz RF si...

Page 28: ...to avoid damaging the amplifier or inflicting serious injuries 1 Apply the load to the amplifier make sure a load is ALWAYS present when working with power amplifiers 2 Apply the DC power to the ampl...

Page 29: ...spincore com products PulseBlaster 4 SpinCore also offers the following to supplement the iSpin NMR system NMR Magnets Probes Duplexer Transmit Receive Circuitry Custom RF Filters and Cables Oven Con...

Page 30: ...4631 NW 53rd Avenue SUITE 103 Gainesville FL 32653 USA Telephone USA 352 271 7383 Website http www spincore com Web Contact Form http www spincore com contact shtml XIV Document Information Revision...

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